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Stormy weather for malware defenses
Robert Lemos, SecurityFocus 2007-03-05

When the Storm Worm swept through the Internet in mid-January, the program's writers took a brute force approach to evading antivirus defenses: They created a massive number of slightly different copies of the program and released them all at the same time.

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Signatures 2007-03-06
Calyptix Security
Signatures can be useful, but this shows some of their limitations. We were very successful in blocking this worm (and variants) early on without any signatures.

http://www.calyptix.com/press/2007/calyptix-pr-20070123.php

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